Vintage Retro Rotary Phone Pocket Watch Hand Craft Casestars Antique Payphone Telephone Quartz Pocket Watch It is a Quartz Watch and really can run The Watch Diameter: 3.5cm(1.38 in) The Length of Chain 80cm(31.5 in) The watch surface diameter aound 3.5cm The Material is Stainless Steel or Alloy Lead and Nickel Free